Remove classes from system templates c*.html.twig

The Needs Review Queue Bot → tested this issue. It either no longer applies to Drupal core, or fails the Drupal core commit checks. Therefore, this issue status is now "Needs work".

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Re-rolled patch #70, Also added few missing files, add updated CSS files. Not adding interdiff as patch #70, no longer applies to D11. please review

Think this is good (if something we still want to do)

Searched the repo for "form-checkboxes" and didn't find anything using that specific class.

The last submitted patch, 82: 2407723-82.patch, failed testing. View results →

#82 not applied on 11.x, Re-roll patch needed.

Re-roll & Convert Patch #82 into MR. Please have a look.

Reroll seems fine.

Sorry, but this needs a review of the change record. It was added in 2015 and does not mention classes being removed. Is it correct?

@quietone is correct.

This was filed ~10 months before Drupal 8 was released, any time during those 10 months would have been a fine time to take care of this.
Drupal 8+ has now been around for 8.5 years, and removing the classes now would be incredibly disruptive and cause many regressions. The intentions here were good, but any benefits they'd have yeilded are trival compared to the problems that would be introduced. Closing so nobody winds up devoting any more time to something that I (Frontend Framework Manager) would not approve.

quietone → closed merge request !5589